Shop Tip #356
© Frank Ford 2006; Photo by FF

Unlike other U.S. coins, pennies start out life at a very handy diameter, namely .7500 inches. That means, you might just have a very accurate and handy measuring device in your pocket at any time - you know, 4 pennies make 3 inches, that sort of thing.  Even this somewhat worn penny has only lost a trifle: